Desktop diffuser



FIG. 1 is a top front perspective view of a desktop diffuser of the present invention;

FIG. 2 is a front side elevational view thereof, with left side, right side, and back side elevational views thereof being a mirror image of the front side elevational view; and,

FIG. 3 is a top plan view thereof.

A bottom plan view has been omitted as it does not form a portion of the claimed design. The broken lines shown in the drawings are directed to environment, are for informational purposes only, and form no part of the claimed design. 

The ornamental design for a desktop diffuser, as shown and described. 